<style type="text/css">
  html, body, .body {
    overflow: hidden;
    text-align: center;
    font-family: sans-serif;
  }
  a {
    font-size: 16px;
  }
</style>

<div class="body">
  <h3>Author: Pavel Evstigneev</h3>
  <a href="https://github.com/paxa/postbird">Postbird on github</a>.
</div>